答案：C

题目分析：考查动词辨析，A. remain保持B. replace代替C. remove拿下D. renew重新开始，句子意思“你的桌子盖满了许多不必要的东西，包括用过的纸和书，你最好拿下它们一些”

点评：这几个动词都是字母r开头的，这也是单词辨析常用的考法，考生平时记忆可以根据字母表背诵，还要注意动词的搭配

即学即练：I tried to persuade him not to keep in touch with her, but what I said was always ______.

A. accepted　　　                   B. received

C. ignored                        D. Noticed

选C